Apparatus for simulating train load in railway roadbed site load test

Abstract

The present invention discloses an apparatus for simulating a train load in a railway roadbed site load test, wherein a buffer layer (2) is disposed under a loading disk (3a) of a high speed hydraulicramming machine (3), the buffer layer (2) is placed in the middle of an upper surface of a rigid loading plate (1); the buffer layer (2) consists of a rigid faceplate (2a) on the top and a cross-bedding layer on the bottom, the cross-bedding layer is formed by staggering thick rubberized pads (2b) and thin steel plates (2c), and downmost and upmost layers of the cross-bedding layer are thick rubberized pads (2b); both the rigid loading plate (1) and the buffer layer (2) are provided with a vertical central spacing hole (5), a rigid limiting rod (4) is inserted into the central spacing hole (5), and a height of the rigid limiting rod (4) is smaller than a sum of a thickness of the rigid loading plate (1) and a thickness of the buffer layer (2). The apparatus is simple in structure, reliable in performance, convenient in installation, debugging and movement, high in test efficiency, and low in test costs.

Description

technical field [0001] The invention relates to a device for simulating the load effect of trains in field loading tests of railway subgrades. Background technique [0002] my country's high-speed railway, ordinary passenger railway and heavy-haul railway construction have all entered a period of rapid development. High-speed railways operate at high speeds, and heavy-haul railways have a large tonnage, which puts forward high standards for the dynamic stability of railway line structures such as roadbeds and pile foundations. Before the line structure is put into use, it is necessary to carry out a dynamic stability field test to simulate the train load to obtain the relevant dynamic response parameters of the subgrade and clarify its dynamic performance to ensure the safe operation of the railway. [0003] The main structure and working principle of the device for simulating the train load in the existing railway subgrade field loading test are as follows: the eccentric d...

AI Technical Summary

Problems solved by technology

Its disadvantages are: the device for simulating the train load is a special equipment, the structure of the equipment is complicated, and the installation, replacement and debugging are cumbersome; it needs to use expensive frequency conversion speed regulating motor and speed increaser; the power source is electric energy, but in the road construction site There is often no electricity available, and diesel generators are needed to generate electricity, which has high energy consumption costs; the overall equipment is bulky and inconvenient to transport; it is difficult to meet the needs of on-site testing of subgrade dynamic stability required by current large-scale railway construction

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